rozer007

Q1. What symbol is use to represent the hashes in perl?
ans: The % symbol is use to represent hashes in perl.

Q2.How can we convert a hashes to an array?
ans: We can convert a hashes to an array using this syntax: my @var = %hashes.

Q3.How can we access item from a hash in perl?
ans: We will use sigil $ while accessing the item in hash. syntax: hash

Q4.What function is use to check if a key in present in a hash?

rozer007

Q1.Do we need to define the return type of the subroutines in perl?
ans: No, we don't need to define the return type in perl.

Q2.In which array does the arguements receive by the subroutine are stored?
ans: All the arguments recieve by the subroutines is stored in @_ array.

Q3.How do we define a default value for an argument in a subroutine?
ans: syntax: $var_name ||=value;

Q4.What is a state variable ?

rozer007

Q1.How can we find the length of the string ?
ans: scalar @array_name will give the length of the array.

Q2. What is the use grep function?
ans: grep function is use to filter out the array according to condition or expression.

Q3.How can we remove a slice of array from an array?
ans: we can use splice function to remove a slice of elements from an array.

Q4. What is the function of unshift?

rozer007

Q1. what is last statement in Perl?
ans: last statement is use to break out of a running loop.

Q2.How can we skip to the next iteration in a loop?
ans we can use next statement to skip to the next iteration of a loop.

Q3.How many type of loop are there in perl?
ans: There are three types :- for loop, while loop and do while loop.

Q4.What is the syntax for for loop?

rozer007

Q1. what will be the return value if a condition is false?
ans: 0 or " ".

Q2.What are switch statement called in perl?
ans: Given and when statement.

Q3.What is the math function to convert a hexadecimal to decimal?
ans: Hex function syntax: hex hexadecimal value.

Q4.How can we get a random value between 0 and 1?

rozer007

Q1. What is the syntax for multiline comment in perl ?
ans: syntax : =begin  .....comments .....=end =cut

Q2. is there a integer data type in perl ?
ans: No , perl have three data types : scalar,array and hashes.

Q3. How do we access a scalar variable in perl?
ans: We use sigil ($) before every scalar variable while accessing.

Q4. what is difference while print' ' and print" " ?

rozer007

Q1. What are metatable?
ans: Metatable are table that are used to modify the behaviour of a table.

Q2. How can we attach a metatable for particular table?
ans: In lua , we have setmetatable function which will attach a metatables for a table.

Q3. How can we use a metamethod defined in the module?
ans: we can just use the particular operator to perform the operation of the metamethod define in the metatables.

rozer007

Q1. What does a+ mode means in lua?
ans: a+ mode is the mode where we can append,read and create a file.

Q2. How can we create a file in lua?
ans: We can open the file in w+ , if the file doesn't exist it will create a new file.

Q3. what does seek() do in lua?
ans: seek() function is use to place the filepointer to a specific position.

Q4. What does close() function do?

rozer007

Q1.What is a module in lua
ans: A module is like a library full of functions and variables.

Q2.How do we create a modules ?
ans: It can be created as the same way as we create a tables, but the filename should be same as the module name.

Q3.How can we load a module in our lua file?
ans: We will require keyword which is used to gain access to the function of the modules.

rozer007

Q1. Do we need to define the return type while defining a function ?
ans: No,There is no nedd to define a return type ofr a function in lua.

Q2.What is a variadic function in lua?
ans: variadic function are those function which accepts unknown number of arguments.

Q3.What is anonymous function in lua?
Ans: Anonymous function are those function which have body but doesn't have a name.

Q4.Does closure have access to all the locak variable in the program?